Magnetic properties and pseudogap formation in infinite-layer nickelates: insights from the single-band Hubbard model

Abstract

We study the magnetic and spectral properties of a single-band Hubbard model for the infinite-layer nickelate compound LaNiO${}_2$. As spatial correlations turn out to be the key ingredient for understanding its physics, we use two complementary extensions of the dynamical mean-field theory to take them into account: the cellular dynamical mean-field theory and the dynamical vertex approximation. Additionally to the systematic analysis of the doping dependence of the non-Curie-Weiss behavior of the uniform magnetic susceptibility, we provide insight into its relation to the formation of a pseudogap regime by the calculation of the one-particle spectral function and the magnetic correlation length. The latter is of the order of a few lattice spacings when the pseudogap opens, indicating a strong-coupling pseudogap formation in analogy to cuprates.

arXiv comment8 pages, 5 figures, submitted to the Condensed Matter Physics section in Frontiers in Physics for the research topic "Advances in Superconducting Infinite-Layer and Related Nickelates"

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• Magnetic correlations in infinite-layer nickelates: an experimental and theoretical multi-method study
• Optimizing superconductivity: from cuprates via nickelates to palladates
• Strongly correlated superconductivity with long-range spatial fluctuations
• Topotactic-hydrogen forms chains in $AB$O${}_2$ nickelate superconductors
• Signatures of topotactic hydrogen in nickelate superconductors
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• Possible structural quantum criticality tuned by rare-earth ion substitution in infinite-layer nickelates
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• Coherent cellular dynamical mean-field theory: a real-space quantum embedding approach to disorder in strongly correlated electron systems